Structural, electrical, and thermal properties of Ba-substituted B(Pb)SCCO superconductors prepared by sol-gel method

IF 2.3 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS Journal of Sol-Gel Science and Technology Pub Date : 2024-10-16 DOI:10.1007/s10971-024-06568-6

Firas Salim Abed, Lamia K. Abbas

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Abstract

In this study, some physical properties of BSCCO superconductors have been investigated. The effects of Ba substitution in Bi_1.7Pb_0.3Sr_2-yBa_yCa₂Cu₃O_10+δ superconductor synthesized by the sol-gel method on the structural, thermal, and superconducting properties were identified. X-ray diffraction patterns display the dominant Bi-2223 high-temperature phase (HTP) mixed with the Bi-2212 low-temperature phase (LTP) in all samples. Variations in lattice parameters (a, b and c) significantly affect sample properties such as lattice volume, c/a ratio, and molecular weight (w). The highest percentage of HTP% appeared at y = 0.1 Ba content. Transmission Electron Microscopy (TEM) displays the formation of rod-like structures with nanoscale lengths. The Ba substitution ratio significantly determines the lattice dimension and oxygen content, affecting the prepared superconductor’s transition temperature (Tc). Thermogravimetric analysis (TGA) and differential thermal analysis (DTA) show the changes in mass loss and shifting in decomposition temperatures correlated with the Ba substitution rate. The optimal ratio of Ba was at y = 0.1, which exhibits the highest HTP percentage of 73.07% and the highest T_c of 113.5 K, suggesting improved superconducting properties.

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溶胶-凝胶法制备的钡取代B(Pb)SCCO超导体的结构、电学和热学特性

本研究对 BSCCO 超导材料的一些物理性质进行了研究。确定了溶胶-凝胶法合成的 Bi1.7Pb0.3Sr2-yBayCa2Cu3O10+δ 超导材料中 Ba 取代对结构、热和超导特性的影响。X 射线衍射图样显示，在所有样品中，Bi-2223 高温相（HTP）与 Bi-2212 低温相（LTP）混合占主导地位。晶格参数（a、b 和 c）的变化会显著影响样品的特性，如晶格体积、c/a 比和分子量（w）。当钡含量为 y = 0.1 时，HTP 百分比最高。透射电子显微镜（TEM）显示形成了具有纳米级长度的棒状结构。钡的替代率在很大程度上决定了晶格尺寸和氧含量，从而影响制备的超导体的转变温度（Tc）。热重分析（TGA）和差热分析（DTA）表明，质量损失的变化和分解温度的变化与钡的取代率有关。钡的最佳比例为 y = 0.1，表现出最高的 HTP 百分比（73.07%）和最高的 Tc（113.5 K），表明超导特性得到了改善。

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来源期刊

Journal of Sol-Gel Science and Technology 工程技术-材料科学：硅酸盐

CiteScore

4.70

自引率

4.00%

发文量

280

审稿时长

2.1 months

期刊介绍： The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.